J. Med. Internet Res. - Participant profiles according to recruitment source in a large Web-based prospective study: experience from the Nutrinet-Sant? study.

Tópicos

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Resumo

CKGROUND: Interest in Internet-based epidemiologic research is growing given the logistic and cost advantages. Cohort recruitment to maximally diversify the sociodemographic profiles of participants, however, remains a contentious issue.OBJECTIVE: The aim of the study was to characterize the sociodemographic profiles according to the recruitment mode of adult volunteers enrolled in a Web-based cohort.METHODS: The French NutriNet-Sant? Web-based cohort was launched in 2009. Recruitment is ongoing and largely relies on recurrent multimedia campaigns. One month after enrollment, participants are asked how they learned about the study (eg, general newscast or a health program on television, radio newscast, newspaper articles, Internet, personal advice, leaflet/flyers) The sociodemographic profiles of participants recruited through operative communication channels (radio, print media, Internet, advice) were compared with the profiles of those informed through television by using polytomous logistic regression.RESULTS: Among the 88,238 participants enrolled through the end of 2011, 30,401 (34.45%), 16,751 (18.98%), and 14,309 (16.22%) learned about the study from television, Internet, and radio newscasts, respectively. Sociodemographic profiles were various, with 14,541 (16.5%) aged =60 years, 20,166 (22.9%) aged <30 years, 27,766 (32.1%) without postsecondary education, 15,397 (19.7%) with household income <?1200/month, and 8258 (10.6%) with household income ?3700/month. Compared to employed individuals, unemployed and retired participants were less likely to be informed about the study through other sources than through television (adjusted ORs 0.56-0.83, P<.001). Participants reporting up to secondary education were also less likely to have learned about the study through radio newscasts, newspaper articles, Internet, and advice than through television (adjusted ORs 0.60-0.77, P<.001).CONCLUSIONS: Television broadcasts appear to permit the recruitment of e-cohort participants with diverse sociodemographic backgrounds, including socioeconomically disadvantaged individuals who are usually difficult to reach and retain in long-term epidemiologic studies. These findings could inform future Web-based studies regarding the development of promising targeted or general population recruitment strategies.

Resumo Limpo

ckground interest internetbas epidemiolog research grow given logist cost advantag cohort recruit maxim diversifi sociodemograph profil particip howev remain contenti issueobject aim studi character sociodemograph profil accord recruit mode adult volunt enrol webbas cohortmethod french nutrinets webbas cohort launch recruit ongo larg reli recurr multimedia campaign one month enrol particip ask learn studi eg general newscast health program televis radio newscast newspap articl internet person advic leafletfly sociodemograph profil particip recruit oper communic channel radio print media internet advic compar profil inform televis use polytom logist regressionresult among particip enrol end learn studi televis internet radio newscast respect sociodemograph profil various age year age year without postsecondari educ household incom month household incom month compar employ individu unemploy retir particip less like inform studi sourc televis adjust or p particip report secondari educ also less like learn studi radio newscast newspap articl internet advic televis adjust or pconclus televis broadcast appear permit recruit ecohort particip divers sociodemograph background includ socioeconom disadvantag individu usual difficult reach retain longterm epidemiolog studi find inform futur webbas studi regard develop promis target general popul recruit strategi

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